Make ff_sin_tabs constant to rdft.c
[libav.git] / libavcodec / ass.c
CommitLineData
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1/*
2 * SSA/ASS common funtions
3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "avcodec.h"
23#include "ass.h"
24
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25int ff_ass_subtitle_header(AVCodecContext *avctx,
26 const char *font, int font_size,
27 int color, int back_color,
28 int bold, int italic, int underline,
29 int alignment)
30{
31 char header[512];
32
33 snprintf(header, sizeof(header),
34 "[Script Info]\r\n"
35 "ScriptType: v4.00+\r\n"
36 "\r\n"
37 "[V4+ Styles]\r\n"
38 "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
39 "Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
40 "\r\n"
41 "[Events]\r\n"
42 "Format: Layer, Start, End, Text\r\n",
43 font, font_size, color, color, back_color, back_color,
44 -bold, -italic, -underline, alignment);
45
46 avctx->subtitle_header = av_strdup(header);
47 if (!avctx->subtitle_header)
48 return AVERROR(ENOMEM);
49 avctx->subtitle_header_size = strlen(avctx->subtitle_header);
50 return 0;
51}
52
53int ff_ass_subtitle_header_default(AVCodecContext *avctx)
54{
55 return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
56 ASS_DEFAULT_FONT_SIZE,
57 ASS_DEFAULT_COLOR,
58 ASS_DEFAULT_BACK_COLOR,
59 ASS_DEFAULT_BOLD,
60 ASS_DEFAULT_ITALIC,
61 ASS_DEFAULT_UNDERLINE,
62 ASS_DEFAULT_ALIGNMENT);
63}
64
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65void ff_ass_init(AVSubtitle *sub)
66{
67 memset(sub, 0, sizeof(*sub));
68}
69
70static int ts_to_string(char *str, int strlen, int ts)
71{
72 int h, m, s;
73 h = ts/360000; ts -= 360000*h;
74 m = ts/ 6000; ts -= 6000*m;
75 s = ts/ 100; ts -= 100*s;
76 return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts);
77}
78
79int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
80 int ts_start, int ts_end, int raw)
81{
82 int len = 0, dlen, duration = ts_end - ts_start;
83 char s_start[16], s_end[16], header[48] = {0};
84 AVSubtitleRect **rects;
85
86 if (!raw) {
87 ts_to_string(s_start, sizeof(s_start), ts_start);
88 ts_to_string(s_end, sizeof(s_end), ts_end );
89 len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,",
90 s_start, s_end);
91 }
92
93 dlen = strcspn(dialog, "\n");
94 dlen += dialog[dlen] == '\n';
95
96 rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
97 if (!rects)
98 return AVERROR(ENOMEM);
99 sub->rects = rects;
100 sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
101 rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
102 rects[sub->num_rects]->type = SUBTITLE_ASS;
103 rects[sub->num_rects]->ass = av_malloc(len + dlen + 1);
104 strcpy (rects[sub->num_rects]->ass , header);
105 strncpy(rects[sub->num_rects]->ass + len, dialog, dlen);
4ab4d65f 106 rects[sub->num_rects]->ass[len+dlen] = 0;
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107 sub->num_rects++;
108 return dlen;
109}